Jetta L4-1.8L Turbo (AWP) (2004)
Air Injection Control Valve: Testing and Inspection
Combination Valve, Checking
With Manufacturer's Scan Tool
Special tools and equipment
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VAG 1390 hand vacuum pump
Test requirements
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No DTCs in DTC memory.
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Output Diagnostic Test Mode (DTM) performed.
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No leaks in vacuum lines or hose connections
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Vacuum hoses not clogged or kinked
Test sequence
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Disconnect vacuum hose -1- at Secondary Air Injection (A1R) solenoid valve (N112) -2-.
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Connect VAG 1390 vacuum pump to vacuum hose -1-.
NOTES: Do not use pressurized air for the following test!